Prepartion and separation performance of GO modified PVDF ultrafiltration membrane

doi:10.11949/j.issn.0438-1157.20170217

Abstract

Abstract:

EDTS-GO nanocomposites were prepared by decorating graphene oxide (GO) with N-(trimethoxysilylpropyl) ethylenediaminetriacetic acid sodium (EDTS). Then EDTS-GO modified PVDF ultrafiltration membrane was prepared by introducing EDTS-GO through blending method. Contact angle results indicated that the hydrophilicity of PVDF membrane was improved owing to introducing EDTS-GO. This was due to EDTS-GO transferring to membrane surface during phase inversion, which was confirmed by FTIR. The effect of the EDTS-GO addition content on membrane property was investigated systematically. With an increase in EDTS-GO content, the water flux of EDTS-GO modified PVDF membrane initially increased and then decreased and reached to maximum of 711.2 L·(m²·h)^-1 in the 0.5% content. Furthermore, antifouling experiment demonstrated EDTS-GO modified PVDF ultrafiltration membrane possessed the stronger fouling-resistant performance than pristine PVDF ultrafiltration membrane.

Key words: EDTS-GO nanocomposites, PVDF UF membrane, antifouling performance

摘要：

用N-（三甲氧基硅丙基）乙二胺三乙酸钠（EDTS）对氧化石墨烯进行修饰，制备出亲水的EDTS-GO纳米复合物。然后通过共混的方式将EDTS-GO添加到PVDF中，制备出EDTS-GO改性PVDF超滤膜。接触角分析和红外光谱结果表明，在相转化过程中EDTS-GO转移至膜表面，PVDF膜表面的亲水性增强。系统考察了不同EDTS-GO添加量对膜性能的影响。膜性能测试表明，随着EDTS-GO添加量的增加，PVDF膜的纯水通量先增大然后降低，当添加量为0.5%时，纯水通量达到最大值，711.2 L·（m²·h）^-1。此外，抗污染实验表明，EDTS-GO改性的PVDF超滤膜比未改性的PVDF超滤膜具有更强的抗污染性能。

关键词: EDTS-GO纳米复合物, PVDF超滤膜, 抗污染性能

CLC Number:

TQ028.8

XUE Juanqin, WANG Sen, HAN Xiaolong, WANG Yuqi, LI Jiding. Prepartion and separation performance of GO modified PVDF ultrafiltration membrane[J]. CIESC Journal, 2017, 68(9): 3466-3473.

薛娟琴, 王森, 韩小龙, 王玉琪, 李继定. 氧化石墨烯改性PVDF超滤膜制备及分离性能[J]. 化工学报, 2017, 68(9): 3466-3473.

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